Mechanical Properties of MgB2-Based Superconductive Materials

Abstract

Presented are the results of the investigations of the structure and mechanical properties of consolidated MgB₂-based superconducting materials produced under high pressures and temperatures and hot pressing. It is established that the formations of inclusions of higher borides of phases with stoichiometry, close to MgB₁₂, considerably influenced on the level of the density of a critical current and mechanical properties of superconductive materials, in particular, leads to increase of the microhardness. The presence of additions of the Ti and SiC (10%), which positively influences the level of superconducting properties, accompanies by the change of mechanical properties, which are testify to the influence of the additions on the formations of MgB₁₂ inclusions.